Hi Jomaco,
The value of a mattress purchase is relative to all the criteria that are part of a mattress purchase that are most important to you. Which one is the best “value” for you is something only you can decide and may be different from which mattress is the best value for someone else.
When you are down to finalists that are all choices between “good and good” and none of them have any weak links or lower quality materials in their design and if there are no clear winners between them then you are in the fortunate position that any of them would likely be a suitable choice and post #2 here can help you make a final choice based on your local testing, your conversations with each of them, your confidence about the suitability of each one, the prices, the exchange or return options you have after a purchase, any additional extras that are part of each purchase, and on “informed best judgement” based on all the other objective, subjective, and intangible parts of your personal value equation that are most important to you.
Phoenix